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Mobile Engineering Leadership
Leading mobile teams through architecture, release quality, performance, and the everyday decisions that keep apps shippable.
React Native · iOS · Android · CI
Staff+ engineering · mobile and web · open to intro calls
Frontends that stay calm when money is on the line.
I'm Kalle. A hands-on engineering leader for mobile and web products in fintech, financial software, and other high-stakes domains. I help teams ship the thing, then leave them stronger than I found them.
$kalle.help_with("mobile teams")
Built and led teams in
FintechBankingMobile productsDesign systemsCloud platformsEngineering teams
19
Years building software systems
12 years full-time
Several
Teams hired and mentored
From startups to global orgs (3k+ people)
Many
Zero-to-one products kicked off
Across web, mobile, and platform
∞
Code reviews left
A career's worth
What I do
Mobile-first these days, but the toolkit is wider.
Most engagements blend two or three of these. We scope it together in the first call: no fixed packages, no retainer roulette.
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High-Class Frontends
Web apps that feel like products, not portals. Design systems, accessibility, motion, and performance budgets that survive reality.
React · Next.js · Design systems
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Tech Leadership
Staff+ partnership for strategy, hiring, mentoring, engineering ladders, and the operating rhythm that turns plans into shipped work.
Org design · Hiring · 1:1 frameworks
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System Architecture
Plain-language architecture work for the scale you actually need, with trade-offs documented before they become expensive folklore.
DDD · Event-driven · ADRs
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Cloud & Infra
Cost-aware, reliability-aware platforms with boring deploys, useful observability, and enough automation to keep teams moving.
AWS · GCP · Kubernetes · Terraform
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Full-Stack Development
A senior pair of hands in the repo when the team needs more throughput, sharper reviews, or a path through a tricky migration.
TypeScript · Node · Postgres
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Developer Growth
Workshops, pairing, and coaching that help engineers level up in the work they already have to do.
Workshops · Pairing · Mentoring
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Process & Delivery
Small batches, fewer ceremonies, stronger feedback loops, and delivery systems engineers can actually trust.
Flow · Reviews · Trunk-based
Selected work
A few engagements. Different shapes of help.
Current
Staff Software Engineer · Mobile / React Native
Consumer mobile foundations at a global crypto exchange
Working on the next generation of a crypto-native neobank product across iOS and Android, with focus on React Native architecture, technical direction, and developer experience across product-facing teams.
React NativeiOSAndroidMobile architecture
Team
20+ app engineers
Org
800+ engineers
Scope
Consumer mobile
Timeless Investments
Head of Engineering
Product, team, and platform leadership across a 4-year chapter
Owned technology strategy while helping shape hiring, mobile delivery, and engineering systems for a growing investment product over multiple stages of company maturity.
Engineering leadershipHiringStrategyFintech
Tenure
4 years
Domain
Investment product
Shape
Scale-up journey
About You
Senior Frontend Engineer
Frontend modernization for high-traffic commerce
Worked on the redesign and modernization of About You's desktop shop experience, including migration from class components to modern React patterns in a large-scale e-commerce codebase.
ReactTypeScriptReact RouterStyled Components
Surface
Desktop shop
Focus
Modernization
Domain
E-commerce
How I work
A simple loop, repeated until I'm not needed.
01
Listen
A focused call to understand the product, the team, the constraints, and whether I am the right person to help.
02
Scope
A short written proposal with objectives, working mode, success criteria, and the trade-offs we are choosing together.
03
Embed
I get close to the work: the repo, the rituals, the architecture, the people, and the decisions that shape delivery.
04
Hand off
The engagement is successful when the team can keep the momentum without me. That is the real deliverable.
Tools of the trade
What I reach for, and why it does not really matter.
Frameworks change. The shape of a good system, a healthy team, and a reliable delivery cadence is more durable.
Mobile
React NativeSwift / iOSKotlin / AndroidExpo
Frontend
ReactNext.jsTypeScriptTailwind
Backend
Node.jsPostgresGraphQLtRPC
Cloud
AWSGCPKubernetesTerraform
Practice
DDDCI/CDObservabilityArchitecture decisions
Get in touch